💄(app-desk) integrate cunningham design system

Integrate cunningham design system into app desk.
It comes with some boilerplate code that will have to be
adapted to our needs when we will get the design.

src/frontend/app/desk/package.json

@@ -5,11 +5,13 @@
   "scripts": {
     "dev": "next dev",
     "build": "next build",
+    "build-theme": "cunningham -g css,ts -o src/cunningham --utility-classes",
     "start": "next start",
     "lint": "next lint",
     "prettier": "prettier --write ."
   },
   "dependencies": {
+    "@openfun/cunningham-react": "2.4.0",
     "next": "14.0.4",
     "react": "18",
     "react-dom": "18"